7.8mm COTTER PINS FOR VINTAGE CHILDREN’S BIKES OR OTHER USES RARE SIZE NOSVERY RARE SMALL SIZE BIKE 7.8mmCOTTER PINS FOR KIDS BIKES OR OTHER USES NOSTHESE ARE REALLY RARE SMALL SIZE COTTERPINS THAT WERE USED ON SOME KIDS BIKES 30-60 YEARS YEARS AGOTHEY ARE ONLY 7.8mm HEAD DIAMETER SO CAN ONLY BE USED WITH CERTAIN CRANK SETS. I THINK EUROPEAN BUT NOT 100% SURE IF ONLY EURO.THE LISTING IS FOR A PAIR (2) COTTERPINS.THEY HAVE A STANDARD M6 THREADREALLY RARE NEW OLD STOCK FIND IN THE BOSSES BARN SO FINISH NOT PERFECT! WE ALSO HAVE THESE IN 8.7mm PLEASE SEE OTHER LISTING .IF YOU NEED STANDARD COTTERPINS, (9.5mm) OR UN MILLED PLEASE SEE OUR OTHER LISTINGS OR CONTACT US.PLEASE ONLY BUY THESE IF YOU ARE SURE THEY ARE WHAT YOU NEED